Quick-detachable connection for tire-valve stems



W. R. DONALDSON QUICK DETAOHABLE CONNECTION FOR 'TIRE .VALVE s'rEMs Y Original Filed March 18, 41922 WITNESSES 45' 1N VENTOR B W. Q. onddson,

'BY//wwg/,

ATTORNEYSv Patented Feb. 10, 1925.

WALTER RICHARD DONALDSN, OF PHOENIX, ARIZONA.

QUICK-DETACHABLE ,('JONNECIIONu FOB, TIRE-VAL'V'E `SIIEMS.

Original application filed March 18, 1922, Serial No. 544,796. Bividednand this application, filed March 7, i923. serial No. enz-3,477. i i i i To `all whom t may concern:

Be", itknown that I, l/VALTER R. DONALD- soN, 4a citizen ot"the United States, and a resident of Pho`enix,`in the county of Mariycopa'and State of Arizona, have invented "certain new and 'useful'lmprovements in (ggiiicl,-Detachable Connections Jfor Tire- "YalveStemsMoi which the following is a s'peaton- -This invention relates tov a quick detach- A`c@iinection for` use in the inlating, of pneumatietires orthe like, and this aplicaft'i'on 'forms a division of my application jtor. automatic inflating valves and pressure gau'ggesg""tiled, March 18, 1922, Serial No. a 54st,? 96, `wl1ich" has matured into Patent No. 11,495,679, patented May` 27, 1924.

"The object of (the invention is to provide a` quick .detachableconnection which may bereadily and securelyialthough releasably associatedwithfthe `valve stem of a pneumatic tire Aand, this irrespective of the type y of `wheel uponwhich the tire is mounted, the yrptiiclr detachable tire valve connection being "org'anized and adapted to carry' out its functions not only withV the light type of artillery or woodenwheels having relatively greatclearane or Working space but also with thefheavy type of wheels used on the rearend of heavyfcars as well as with wire "wheels or disk wheels.

` "NA further object is to provide a quick detachable` connection of this character havdust cap of the tirel and valve stem` without necessitating the Vuse oi pliers Or the likef l @ther `objects and` advantages of the in- "vention consists of certain' novel features of theiconstruction, combination and arrangement o'f parts which will be herein- "aftermore fully described and particularly pointed out in the appended claims, reference beinghad to the accompanying draw- 4ings),forming part of this specilication, and "inwhichf "Figure l isa View inside elevation, il-

i lustratingthefpreterred embodiment of the inventiom" `Figure 2 is a group view in perspective, showingthe parts of-thetire valve confnection, except i the casing iiiilnediately'` prior htoasseinbly, Figure?) is a view of the assembly in central `longitudinal `vertical` section; and

Figure l is a detail view in section, showing a modiiied form of packing or `coupling Washer.

Referring to the ,drawings wherein for the sake of illustration is shownA the preferred embodiment of the invention, the

automatic tire valve coiinectionis ldesignatedgenerally at A and is adapted tofbe associated with the tire valve stem B of ajpneumatic tire in thelmanner'shownin,

C is Vadapted to be connected Wjjith a'combincd `gauge and distributing valveforming the Subject-matter@tiny application, iled March 18, 1922, `Sierialilfilo.l 544,796?

The automatictire "valvefconnection includes a casing cliziir1beiecl,`as' at 11, and having a stem 12 aiiording communication y between the chamber of the casilrgand the "of 'and in the assembly` tlienboss depends from the plate l-las shown?, in Figure 3, and the boss and the plate are provided with ports 17 and 18, Athe port 17 extending transversely of, the bossandthe port 18 extending longitudinally of the boss and n y through the plate and'` coimnunicating lwith ing means for facilitating the removal of the the port 17. packing or couplingjfwaslier 19 is 'arranged neit tothe plate24 and is formed with an axial opening 2O` and is also cutaway around its upper marginal edge, as at 21. This washer 19 issupported in position by meansf of a retaining cup 22 having threaded engagement, as at 23, with the casing 1Q and engaging the washer 19 and forcing it against the plate' 1%. The base of the 'retaining cup is provided with i an axial opening`2-l and diametricaily opposite slots 255, the `openin.,f 'admitting of the passage of the valve stem" of the tire valve and the slots 25 facilitating the engagement of a screw driveror other suitable tool with the retaining cup to'assemble and disassemble it. rlhe arrangement is Figure e` andby meansoif'a'tlexibleigpipe" such that the boss 16 is arranged laxially of the opening-2O of the washerlQ and the ports 15 of the plate let overlie Vthe cutaway portion 21 of the washer so that the pressure may `flow through these pforts and be active to urge the washer into operative engagement with the tire valve, as shown in Figure 3. This pressure is usually effective to efficiently accomplish packing or sealing engagement between the washer and the stem ot' the tire valve but if desired an endless coil spring 26 may be employed, the coil spring being received in the space provided by cutting away the washer and supplementing the action or' the pressure. It is to be understood however that this coil spring 26 may be dispensed with when desired, leaving the pressure alone to carry out this function.

A rotatable carrier 27 is provided and comprises a ring or annular plate supported for rotary motion by means of the cap or ferrule 23 having a body portion 29 threaded onto the casing l0 and having a xflange 30 engaging the underside ot the carrier 2T. Studs 3l. and 32 depend from ears 33 and 34 provided upon the carrier and upon these studs a chuck or coupling designatedn generally at 35 is supported. 'lhe chuck or coupling comprises a pair o'l` pivoted levers 36 and 3T, respectively, the lever being crossed and being pivotally connected at one end, as at 33, by means oi' the stud 32, the levers having sliding` connection at the point ot their cross by means of a pin and slot arrangement constituted by slots 39 termed in the levers and the stud 3l which performs the function ot' the pin. The arms or portions ot the levers beyond the sliding connection 39 constitute handles and have their confronting faces serrated or toothed, as indicated at 40 and 4l. The levers 36 and 37 carry jaws 42 and 43, respectively, the jaws being integrally formed or rigidly connected with the levers and having their 'faces threaded so that the threads of their faces may mesh with the threads of the tire valve stem, as indicated in Figure 3 so as to securely lock the automatic valve connect-ion to the valve stem ot the tire valve. Between the jaws 42 and and the levers there is provided an inclined and smooth guiding portion 44, as clearly shown in Figures 3 and 6. Nuts 45 and 46 are threaded on the lower end ot the studs 3l and 32 and prevent the chuck irom falling therefrom. Springs 48 and 49 are mounted upon the carrier 2T, as clearly shown in Figure 2, and these springs engage the periphery of the jaws 42 and 43 in the assembly and urge these jaws toward each other.

As shown in Figures 1 and 2, the portions of the levers 35 and 36 which carry the toothed or serrated portions 40 and 4l are adapted to be used to remove the dust cap IG ot the tire valve, as clearly shown in Figures l and 2. After the dust cap has been removed7 the arms or portions of these levers 35 and 36 upon which the jaw faces 40 and 4l are formed, and which constitute handle, members, are grasped so as to swing the jaws 42 and 43 ot' the chuck away from each other thus permitting these jaws to be slipped down over the valve stem ot the tire valve B. This valve stem also readily enters the opening 20 et the washer 19 since the pressure is not active against the washer at this time. fv'hen the intlating valve is properly positioned on the tire valve stem the levers 35 and 36 are released and the springs 43 and 49 urge the jaws 42 and 43 into engagement with the valve stem so that the threads ot the jaws mesh with the treads ot the valve stem. itt this time the lower end ot the boss 1G engages the stem or pin oil the valve and depresses it to open the tire valve automatically. It is to be noted that as the chuck is swiveled on the casing it may be turned to any position which may be convenient and which may iacilitato the association ot' the inlatinjgr valve and the tire valve.

ln lieu oli' constriu-ting the packing or coupling washer 'i9 of the quick detachable connection allier the manner shown in liigures 2 and 3, this washer may be constructed as shown in Figure 4. As shown in Figure T, the packing or coupling washer is designated at 19 and includes an inwardly extending lip 19b adapted to be engaged by the top edge of the tire valve stem and pressed or urged against the plate llA to insure more ellicient packing action by the washer.

lilith this connection practically instan taneous coupling of the valve. stem of a pneumatic tire may be had and the coupling or connection will be fluid-tight and eltective since not only mechanical connection with the threads is had but the packing washer being` pressed against the upper end ct the valve stem will effect a fluid-tight fit. Moreover when the connection is positioned on the valve stem it automatically opens the valve mechanically thus relieving the pressure of this duty. As soon as the filling operation is completed the connection may at once be taken from the valve stem by gripping the handles of the levers 36 and 37 and lifting the connection from the valve stem.

l claim:

l. A quick detachable connection for use with the valve stem ot a tire valve including a casing having means for opening the tire valve and packing means engageable with the valve stem and adapted to be urged into operative packing engagement with the valve stem by the fluid pressure, a` carrier swiveled on the casing and a chuck supported on the carrier and having movable jaws provided with threads engageable with the valve stem.

2. In a device of the character described,

a quick detachable connection for the valve stem of the tire valve comprising a casing, a plate fitted into said casing and having ports intermediate its center and its periphery, said plate having a depending boss adapted to operate the valve stem and having ports therein leading to said plate, a rubber washer arranged in said casing against said plate and having a central opening and having its upper and outer marginal edges cut away, the space defined by said cutaway portion being disposed below said ports whereby the pressure is eective to urge said rubber washer into packing engagement with the valve stem, a retaining cup for said washer having threaded connection with the casing and engaging the plate to retain it in position, a cap having threaded connection with said casing, a rotatable. ring carrier supported upon said cap and having depending studs, a chuck including a pair of crossed levers pivotally supported upon one of said studs, said crossed levers having slots therein coacting with the other oit' said studs to provide a pin and slot connection therewith, said chuck having jaws carried upon said levers and provided with threads engageable with the threads of the valve stem, the levers having portions constituting handles, nuts threaded, upon the lower ends of said studs for retaining the chuck thereon, anld springs tor closing said jaws ar anged upon the rotatable carrier.

3. ln a device ot the character described, quick detachable connection for the valve stem otl the tire valve comprising a casing, a plate fitted into said casing and having ports intermediate its center and its periphery, said plate having a depending boss adapted to operate the valve stem and having ports therein leading to said plate, a rubber washer arranged in said casing against said platel and having a central opening and having its upper and outer marginal edge cut away, the space deined by said cutaway portion being disposed below said ports whereby the pressure is eft'cctive to urge said rubber washer into packing engagement with the valve stem, a retaining cup tor said washer having threaded connection with the casing and engaging the plate to retain it in position, a

cap having threaded connection with said casing, a rotatable ring carrier supported upon said cap and having depending studs, a chuck including a pair of crossed levers pivotally supported upon one of said studs, said crossed levers having slots therein coacting with the other of said studs to provide a pin and slot. connection therewith, said chuck having jaws carried upon said levers and provided with threads engageable with the threads of the valve stem, nuts threaded upon the lower ends of said studs for retaining the chuck thereon, and springs for closing` said jaws arranged upon the rotatable carrier.

4. In a device of the character described, a quick detachable connection for the valve stem of a tire valve comprising a casing, a plate litted in said casing and having a depending boss adapted to operate the valve stein and having ports therein, a. cap having threaded connection with said casing, a rotatable ring carrier supported by said cap and having depending studs, a chuck including a pair ot crossed levers supported upon said studs and having jaws provided with threads engageable with the threads ot the valve stem, and springs for closing said jaws arranged upon said rotatable carrier.

5. A device of the character described, a quick detachable connection tor the valve stem of a tire valve including a casing, a packing washer of rubber in said casing and arranged to be urged into packing engagement with the tire valve by pressure of the fluid, and a chuck carried by said casingand having jaws provided with threads engageable with the threads of the valve stem, said chuck having crossed handles.

6. In a device of the character described, a quick detachable connection for the valve stem of the tire valve comprising a casing, a ported plate in said casing, a washer associated with the plate and having an inwardly extending lip lying against the plate and adapted to be engaged by the end oft the valve stem whereby the washer is urged into packing engagement with the plate, and a chuck attached to the casing and engageable with the valve stein.

WALTER RICHARD DONALDSON. 

